CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

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Author Topic: Sennheiser HD600  (Read 9909 times)

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Bill-p

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Re: Sennheiser HD600
« Reply #20 on: May 23, 2015, 02:43:50 AM »

Sorry, I'm more of an acoustic guy, as you can tell.  :&

Work in progress... everything is reversible. Not sure if I'm liking the results or not... but will publish details if it's any more drastic than this. Currently, 3-5KHz is "only" about 1.5dB too elevated, which I guess is about the "safe zone" but I'd like to see that part flattened if possible.

Will investigate more. Now that I have all the time in the world.
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PianistOne111

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Re: Sennheiser HD600
« Reply #21 on: May 25, 2015, 05:41:26 AM »

Lemme guess: toilet paper?
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kothganesh

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Re: Sennheiser HD600
« Reply #22 on: May 25, 2015, 05:50:19 AM »

Took the plunge and got me a HD 600. Gotta order some Bounty paper towels as well. I would love to see the face of the customs official in India when he/she opens it for inspection. :)
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stratocaster

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Re: Sennheiser HD600
« Reply #23 on: May 26, 2015, 06:24:40 PM »

HD600, slightly modded. What more can one expect for the price these go (used)? And I keep asking myself why I have been spending thousands of dollars on phones that never really lived up to my expectations. 
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graean

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Re: Sennheiser HD600
« Reply #24 on: May 26, 2015, 07:01:56 PM »

Stratocaster, what are the mods?

I had tried front damping with toilet paper/foam, the quarter mod, back damping (in specific locations, as in around the baffle holes and behind the driver or everywhere except directly behind the driver), removing the back foam, removing the plastic baffle that held the back foam, using the headphones grilless, putting electrical tape on the plastic of the earpads to increase seal with the headphone body, adjusting the clamp, and changing the compliance of the earpads.

Basically, I like your graph linearity and distortion measurements very, very much. (No ear pain and headaches from spikes/recession/harmonic distortion addition to specific frequency bands--yessss!!!--more time spent listening and without fatigue during and afterword--yesss!!!--reasonable cost---yesss!!!).



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PianistOne111

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Re: Sennheiser HD600
« Reply #25 on: May 26, 2015, 08:50:31 PM »

stratocaster, your graphs look very pretty. Please tell us your mods!
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kothganesh

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Re: Sennheiser HD600
« Reply #26 on: May 27, 2015, 02:04:59 AM »

Strat, let me join the chorus as well...just got a reasonable price on the 600 and it's on its way.
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stratocaster

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Re: Sennheiser HD600
« Reply #27 on: May 27, 2015, 03:43:46 PM »

The mod consists of a thin disc of cotton plus a ~7mm foam disc right behind the driver plus a very thin sheet of felt covering the cup mesh. I am adding pics of how the stock HD600  measures on my rig (FR and CSD), plus an overlay of stock (red) vs mod  (green) measurements.
As you can see, there are no effects over 5kHz, but definitely below. Also, distortion and CSD have improved.

 
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thegunner100

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Re: Sennheiser HD600
« Reply #28 on: May 27, 2015, 08:26:41 PM »

Whoah, nice! Where can we get some of that modding material?
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maverickronin

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Re: Sennheiser HD600
« Reply #29 on: May 27, 2015, 10:19:34 PM »

That foam look like the same kind of memory foam I use in my custom pads.  Got it from here.
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